An
Energy Saving
Support Tool
3331, 3332
POWER HiTESTER
Power measuring instruments
Accurate evaluation of consumption power
of electrical products
As efficient use of energy for household and office equipment becomes more and more
essential, the new
3332 POWER HiTESTER
does the job by offering a wide range of
power measurement from standby to normal usage. The
3331 POWER HiTESTER
is
capable of evaluating 3-phase devices, such as industrial air conditioners and refrigerators,
or single-phase, large-scale devices. Both power testers deliver high accuracy of ±0.2%
(45 to 66Hz), direct input up to 50A, and a broad bandwidth from 1Hz (the 3331 from
10Hz) to 100kHz. System construction is made easy with these compact, lightweight and
reasonably priced tools, which come equipped with an external interface as a standard
feature. The 3331 and 3332 can be used as a measuring component for a wide range of
purposes, from research and development to equipment evaluation.
3332: Single-phase, 2-wire type that can accurately measure even standby power
3331: Single-phase, 3-wire and three-phase, 3-wire type for measuring power of large-scale equipment
1
Measurement from minute single-phase power
to large-scale 60 kW 3-phase equipment.
A single-phase power meter compatible with devices with intermittent oscillation in broadband starting from 1Hz.
from standby
to usage
The 3332 covers a wide range of power measurement
Model
Measurement line
U
Range
I
Range
Frequency characteristics
3332
1ø2W only
3331
1ø2W to 3ø3W
15 to 600V
(6 ranges)
150 to 600V
(3 ranges)
1m to 50A
(15 ranges)
500m to 50A
(7ranges)
1Hz to 100kHz
10Hz to 100kHz
±0.1%rdg.±0.1%f.s.
(45 to 66Hz)
Approx. 210W
✕100H ✕261D
mm
Basic accuracy
Dimensions
The 3331 is compatible from single-phase to 3-phase devices
❑
Range Table
The values in the shaded areas show the common range for the 3331 and 3332. Values in the (
mode and the single-phase, 3-wire mode (SUM display) of the 3331.
) show the range of the 3-phase, 3-wire
Voltage/Current can be viewed for each phase of the 3-phase line
U
I
1.0000mA 2.0000mA 5.0000mA 10.000mA 20.000mA 50.000mA 100.00mA 200.00mA
15.000 mW 30.000 mW 75.000 mW 150.00 mW 300.00 mW 750.00 mW
30.000 mW 60.000 mW 150.00 mW 300.00 mW 600.00 mW
60.000 mW 120.00 mW 300.00 mW 600.00 mW
150.00 mW 300.00 mW 750.00 mW
300.00 mW 600.00 mW
600.00 mW
500.00mA
7.5000 W
15.000 W
30.000 W
75.000
(150.00)
W
1.2000 W
1.0000A
15.000 W
30.000 W
60.000 W
1.5000 W
3.0000 W
1.5000 W
3.0000 W
6.0000 W
1.2000 W
3.0000 W
6.0000 W
12.000 W
1.5000 W
3.0000 W
7.5000 W
15.000 W
30.000 W
1.5000 W
3.0000 W
6.0000 W
15.000 W
30.000 W
60.000 W
20.000A
300.00 W
600.00 W
1.2000kW
3.0000 W
6.0000 W
12.000 W
30.000 W
60.000 W
120.00 W
50.000A
750.00 W
1.5000kW
3.0000kW
15.000V
30.000V
60.000V
150.00V
300.00V
600.00V
U
I
2.0000A
30.000 W
60.000 W
120.00 W
5.0000A
75.000 W
150.00 W
300.00 W
10.000A
150.00 W
300.00 W
600.00 W
15.000V
30.000V
60.000V
150.00V
300.00V
600.00V
150.00
(300.00)
W 300.00
(600.00)
W 750.00
(1.5000 k)
W 1.5000
(3.0000)
kW 3.0000
(6.0000)
kW 7.5000
(15.000)
kW
150.00
(300.00)
W 300.00
(600.00)
W 600.00
(1.2000 k)
W 1.5000
(3.0000)
kW 3.0000
(6.0000)
kW 6.0000
(12.000)
kW 15.000
(30.000)
kW
300.00
(600.00)
W 600.00
(1.2000 k)
W 1.2000
(2.4000)
kW 3.0000
(6.0000)
kW 6.0000
(12.000)
kW 12.000
(24.000)
kW 30.000
(60.000)
kW
For apparent power and reactive power, the unit of watts in the above table is replaced by VA and var respectively.
2
Basic Performance of the 3331/3332
❑
Evaluation of electric equipment such as inverters
●
High basic accuracy of ±0.2%
More precise measurement non possible with a basic accuracy of
±0.1% rdg.±0.1% f.s.
●
Broadband feature compatible with frequency control devices
Wide range from 1Hz
(the 3331 from 10Hz)
to 100kHz is included
for supporting measurement of inverters.
●
Responsitivity that follows transient power fluctuations
A achieve responses under 0.2 seconds for measurements of
transient power fluctuations (Response speed set at FAST).
●
50A direct input
Measurement of large capacity equipment possible.
●
Simultaneous integration of current and power at a
6-digit high-resolution state
A maximum of ±999999 (MWh or MAh) or up to a maximum
of 10000 hours (416 days) of integration.
●
Measuring the effective value of basic wave components only
The average rectified effective value indicator method with a
500Hz low-pass filter can be selected.
●
Current waveform peak measurement function
The current waveform wave peak value and the maximum
effective value can be detected.
❑
Systems can be easily constructed
●
A compact design that fits a half-rack
(rack-mount models also available at special order)
●
GP-IB / RS-232C:
Data can be transferred to a printer or computer for efficient data management.
●
EXT.I/O (External input/output terminal):
External control of integration START/STOP, and analog/monitor/D/A
output can be performed for voltage/current/power parameters.
3332
3331
Accuracy
Frequency
(at 23˚C±5˚C
(73˚F±9˚F),
80% rh sine wave input, power factor = 1, after 30 minutes warming-up time.) 3331: 23˚C±3˚C
(73˚F±5.4˚F)
(Period for which accuracy is guaranteed: 6 months)
Voltage
*1
/ Current / Active power
Input current 20 A or less
20A to 30A
1Hz to 2Hz
2Hz to 5Hz
*2*3
5Hz to 10Hz
*2*3
10Hz to 20Hz
*2*4
20Hz to 30Hz
*2*5
30Hz to 45Hz
*2
45Hz to 66Hz
66Hz to 500Hz
500Hz to 1kHz
1kHz to 4kHz
4kHz to 8kHz
8kHz to 10kHz
*6
10kHz to 20kHz
20kHz to 50kHz
*2*3
50kHz to 100kHz
*7
±12%f.s.
±5%f.s.
±1.5%f.s.
±1.0%f.s.
±0.5%f.s.
±0.1%rdg.±0.2%f.s.
±0.1%rdg.±0.1%f.s.
±0.1%rdg.±0.2%f.s.
±0.3%rdg.±0.2%f.s.
±0.3%rdg.±0.2%f.s.
±1.0%f.s.
±1.0%f.s.
±2.0%f.s.
±5.0%f.s.
±15.0%f.s.
➞
➞
➞
➞
➞
➞
➞
➞
➞
±2.0%f.s.
±2.0%f.s.
±2.0%f.s.
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30A to 50A
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*1
*2
*3
*4
*5
*6
*7
Voltage accuracy is the same as when current input is less than 20A.
Measurement accuracy when response time is set to SLOW.
Accuracy guaranteed for the 3332 only.
Voltage/current accuracy for the 3331 is ±2.0% f.s.
Voltage/current accuracy for the 3331 is ±1.0% f.s.
Guaranteed accuracy for the 3331 is ±2.0% f.s.
Current is defined for 10A and less.
±0.2%f.s.
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Basis of calculation
ch
1
2
SUM
Calculations of the 3331 3-phase, 3-wire mode are as follows in the table below. However, only SUM is displayed. Calculations for the 3332
follow the values for ch 1 in the table below.
U, I,
and
P
respectively indicate measured values of voltage,
Active power (
P
) Apparent power (
S
) Reactive power (
Q
) Power factor (
λ
)
Phase angle (
ø
)
current, and active power. However, values are not rounded
for display (error: ±1 dgt.).
s
indicates phase polarity, and is -1 when the current phase
leads voltage, and +1 when it lags voltage.
3
From minute standby power to rush current for motors
Applications that efficiently evaluate
electrical equipment
❑
Common features of the 3331 and 3332
●
Measurement of rush current during device start-up
Measurement of the current waveform wave peak is possible,
and if the peak hold function is used, wave peak detection of
the motor rush current waveform
(Max. 90A)
and the maximum
value of the effective value can be done.
●
Measurement of the RMS value for
industrial frequency components.
The average rectified effective value indicator method
(MEAN) with 500Hz low-pass filter is employed to measure
basic wave RMS values of PWM voltage form inverters.
Comparison of voltage display values of RMS and MEAN with the low-pass filter
RMS display of
PWM voltage
waveforms.
MEAN display of
voltage waveform
after filtering.
RMS response at 0.2 sec.
●
Understanding consumptive and
regenerative conditions
Consumptive (+), regenerative (-), and
total power integration values can be
simultaneously measured on equipment
that regenerate power.
Integration progress time
Total (±) integration value
Consumptive element (+)
integration value
Regenerative element (-)
integration value
❑
Special Features of the 3331
●
3-phase line imbalance can be checked
The third phase voltage and current that had not been
measured for 2-power measurement systems (2 voltage/2
current) can be calculated by vector calculation and displayed.
U
1
voltage display
U
2
voltage display
●
The 3331 can be used to measure single -
phase power for 2 devices
Two devices with single-phase, 2-wire loads can be
simultaneously measured, contributing to lower facilities cost.
Note) Ranges for each channel
cannot be independently set.
U
3
voltage display
Average voltage display for each phase
❑
Special Features of the 3332
●
Measurement of standby power under 1W
Current input 1W or less can be precisely measured
(guaranteed accuracy range is from 7.5mW)
by employing the CT method
(input resistance under 2mΩ)
for minimal
instrument damage for current input, and with 150.000mW
(150V-1mA range)
in full scale as the highest sensitivity range for 100V devices. In addition,
with guaranteed accuracy from 1Hz, the 3332 is also compatible with intermittent oscillating devices, such as videos.
●
Precise calculations of minute standby power
When the 150V/1.0000mA range is selected, integration from ±000.000mWh can be
performed. Low numbers/units are automatically switched to a 6-digit display, allowing
measurement in high resolution.
Integration display screen
Current integration display
Integration progress time
●
Comparative decision function that can be used
on the production line
Two items can be chosen from among voltage, current, power (active, reactive,
apparent), peak current, power factor, phase angle, frequency and integration value
for simultaneous comparative decisions. In addition to Hi/In/Lo LED lamps, decision
results are output to contact points. Up to 10 conditions can be stored, a powerful
function to reduce repetitive steps on small output/multi-product lines.
Other parameters
Active power integration
Comparator setting screen
Comparative value setting
Other parameters
Comparator decisions
Measurement value
4
Application example using the GP-IB/RS-232C interface
The 3331 and 3332 are equipped with the GP-IB and RS-232C interfaces as standard features, allowing complete control from a
computer (except for turning the power supply ON/OFF). In addition, measurement data can be directly downloaded into commercially
available spreadsheet software on a computer using application software, making the troublesome creation of test result charts easy,
and supporting effective data management.
Example of chart calculation operation with EXCEL*
*EXCEL is a registered trademark of Microsoft Corporation.
Keeping standby power of household electrical equipment in the range of 1W and below
A plan for reducing contributions to global warming by raising
the efficiency of electrical energy used by household and office
equipment must take standby power into consideration. In
the Japanese domestic market, precise measuring of minute
standby power is needed, especially for manufacturers of
audio/video devices, in order to follow a policy of keeping
standby power under 1W.
Raising the efficiency of electrical energy
consumption to meet the needs of the time
Energy Star Program
The 1995-10 International Energy Star Plan is a program
developed between the United States and Japan with the goal
of universally advancing energy efficient office products, such
as copy machines, printers, and
fax machines.
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